CVE-2026-31857 Details
Description
Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue.
A remote code execution vulnerability has been identified in Craft CMS versions 5.0.0-RC1 through 5.9.8 and 4.0.0-beta.1 through 4.17.3. The issue arises in the conditions system, where the BaseElementSelectConditionRule::getElementIds() method improperly handles user-controlled string input. This input is passed to renderObjectTemplate(), an unsandboxed Twig rendering function that disables escaping. Any authenticated Control Panel user, including those with non-admin roles such as Author or Editor, can exploit this vulnerability by sending a crafted condition rule through standard element listing endpoints. The vulnerability bypasses all production hardening settings and requires no special permissions beyond basic Control Panel access.
Users are advised to update to Craft CMS versions 5.9.9 or 4.17.4, both of which include the necessary patch. Instructions for updating can be found in the Craft CMS documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 12, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| craftcms craft cms | >= 4.0.0.1, < 4.17.4 >= 5.0.1, < 5.9.9 4.0.0 - 4.0.0 beta1 4.0.0 beta2 4.0.0 beta3 4.0.0 beta4 4.0.0 rc1 4.0.0 rc2 4.0.0 rc3 5.0.0 - 5.0.0 rc1 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 17, 2026 | Initial Analysis | [email protected] |
| Mar 11, 2026 | New CVE Received | [email protected] |